White-light emission from a single-emitting-component organic electroluminescent device

Efficient single-emitting-component white organic light-emitting devices with a single-layer and three layer structure fabricated from 1,3,5-tris(2-(9-ethylcarbazyl-3)ethylene)benzene (TECEB), were reported. The white-light emission was found to consist of fluorescence, phosphorescence, and electromer emission. The three-layer electroluminescent (EL) devices fabricated from TECEB exhibited bright and efficient white light with a maximum luminescence and current efficiency of 1200 cd m^-2 and 1.1 cd A ^-1. The results show that the compound TECEB is capable of emitting white light in single-emitting-component EL devices, whose emitting color is independent of the driving voltage.